a^{a1}_{a0,a3} b^{a2,a4,v1}_{v0} gamma1^{a3}_{a4} a+(a0) a+(v0) a-(v1) a-(a2) a-(a1)
+1/2 a^{a0}_{a1,a2} b^{a3,a4,v1}_{v0} gamma1^{a2}_{a4} gamma1^{a1}_{a3} a+(v0) a-(v1) a-(a0)
+1/4 a^{a0}_{a1,a2} b^{a3,a4,v1}_{v0} lambda2^{a1,a2}_{a3,a4} a+(v0) a-(v1) a-(a0)
-1/2 a^{a3}_{a1,a2} b^{a0,a4,v1}_{v0} lambda2^{a1,a2}_{a3,a4} a+(v0) a-(v1) a-(a0)